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Style polygon data features

This example shows an approach to styling polygon geometry based data features.

Read the documentation .

TypeScript

 const 
  
 mapElement 
  
 = 
  
 document 
 . 
 querySelector 
 ( 
 'gmp-map' 
 ) 
  
 as 
  
 google 
 . 
 maps 
 . 
 MapElement 
 ; 
 let 
  
 innerMap 
 ; 
 const 
  
 styleOptions 
  
 = 
  
 { 
  
 strokeColor 
 : 
  
 'green' 
 , 
  
 strokeWeight 
 : 
  
 2 
 , 
  
 strokeOpacity 
 : 
  
 1 
 , 
  
 fillColor 
 : 
  
 'green' 
 , 
  
 fillOpacity 
 : 
  
 0.3 
 , 
 }; 
 async 
  
 function 
  
 initMap 
 () 
  
 { 
  
 // Request needed libraries. 
  
 ( 
 await 
  
 google 
 . 
 maps 
 . 
 importLibrary 
 ( 
 'maps' 
 )) 
  
 as 
  
 google 
 . 
 maps 
 . 
 MapsLibrary 
 ; 
  
 // Get the inner map. 
  
 innerMap 
  
 = 
  
 mapElement 
 . 
 innerMap 
 ; 
  
 // Dataset ID for NYC park data. 
  
 const 
  
 datasetId 
  
 = 
  
 'a75dd002-ad20-4fe6-af60-27cd2ed636b4' 
 ; 
  
 const 
  
 datasetLayer 
  
 = 
  
 innerMap 
 . 
 getDatasetFeatureLayer 
 ( 
 datasetId 
 ); 
  
 datasetLayer 
 . 
 style 
  
 = 
  
 styleOptions 
 ; 
 } 
 initMap 
 (); 
   index 
 . 
 ts

JavaScript

 const 
  
 mapElement 
  
 = 
  
 document 
 . 
 querySelector 
 ( 
 'gmp-map' 
 ); 
 let 
  
 innerMap 
 ; 
 const 
  
 styleOptions 
  
 = 
  
 { 
  
 strokeColor 
 : 
  
 'green' 
 , 
  
 strokeWeight 
 : 
  
 2 
 , 
  
 strokeOpacity 
 : 
  
 1 
 , 
  
 fillColor 
 : 
  
 'green' 
 , 
  
 fillOpacity 
 : 
  
 0.3 
 , 
 }; 
 async 
  
 function 
  
 initMap 
 () 
  
 { 
  
 // Request needed libraries. 
  
 ( 
 await 
  
 google 
 . 
 maps 
 . 
 importLibrary 
 ( 
 'maps' 
 )); 
  
 // Get the inner map. 
  
 innerMap 
  
 = 
  
 mapElement 
 . 
 innerMap 
 ; 
  
 // Dataset ID for NYC park data. 
  
 const 
  
 datasetId 
  
 = 
  
 'a75dd002-ad20-4fe6-af60-27cd2ed636b4' 
 ; 
  
 const 
  
 datasetLayer 
  
 = 
  
 innerMap 
 . 
 getDatasetFeatureLayer 
 ( 
 datasetId 
 ); 
  
 datasetLayer 
 . 
 style 
  
 = 
  
 styleOptions 
 ; 
 } 
 initMap 
 (); 
   index 
 . 
 js

CSS

 /* 
 * Always set the map height explicitly to define the size of the div element 
 * that contains the map. 
 */ 
 gmp-map 
  
 { 
  
 height 
 : 
  
 100 
 % 
 ; 
 } 
 /* 
 * Optional: Makes the sample page fill the window. 
 */ 
 html 
 , 
 body 
  
 { 
  
 height 
 : 
  
 100 
 % 
 ; 
  
 margin 
 : 
  
 0 
 ; 
  
 padding 
 : 
  
 0 
 ; 
 } 
 # 
 attribution 
  
 { 
  
 background-color 
 : 
  
 rgba 
 ( 
 255 
 , 
  
 255 
 , 
  
 255 
 , 
  
 0.7 
 ); 
  
 font-family 
 : 
  
 "Roboto" 
 , 
  
 "Arial" 
 , 
  
 "sans-serif" 
 ; 
  
 font-size 
 : 
  
 10 
 px 
 ; 
  
 padding 
 : 
  
 2 
 px 
 ; 
  
 margin 
 : 
  
 2 
 px 
 ; 
 } 
   style 
 . 
 css

HTML

<html>
  <head>
    <title>Style a polygon data feature</title>

    <link rel="stylesheet" type="text/css" href="./style.css" />
    <script type="module" src="./index.js"></script>
    <!-- prettier-ignore -->
    <script>(g=>{var h,a,k,p="The Google Maps JavaScript API",c="google",l="importLibrary",q="__ib__",m=document,b=window;b=b[c]||(b[c]={});var d=b.maps||(b.maps={}),r=new Set,e=new URLSearchParams,u=()=>h||(h=new Promise(async(f,n)=>{await (a=m.createElement("script"));e.set("libraries",[...r]+"");for(k in g)e.set(k.replace(/[A-Z]/g,t=>"_"+t[0].toLowerCase()),g[k]);e.set("callback",c+".maps."+q);a.src=`https://maps.${c}apis.com/maps/api/js?`+e;d[q]=f;a.onerror=()=>h=n(Error(p+" could not load."));a.nonce=m.querySelector("script[nonce]")?.nonce||"";m.head.append(a)}));d[l]?console.warn(p+" only loads once. Ignoring:",g):d[l]=(f,...n)=>r.add(f)&&u().then(()=>d[l](f,...n))})
        ({key: "AIzaSyA6myHzS10YXdcazAFalmXvDkrYCp5cLc8", v: "weekly" });</script>
  </head>
  <body>
    <gmp-map center="40.757815, -73.933123" zoom="11" map-id="5cd2c9ca1cf05670" map-type-control="false">
      <div id="attribution" slot="control-block-end-inline-start">Data source: NYC Open Data</div>
    </gmp-map>
  </body>
</html>  index.html

Try Sample

JSFiddle.net

Clone Sample

Git and Node.js are required to run this sample locally. Follow these instructions to install Node.js and NPM. The following commands clone, install dependencies and start the sample application.

  
  git 
  
 clone 
  
 https 
 : 
 //github.com/googlemaps-samples/js-api-samples.git 
 
  
  cd 
  
 samples 
 / 
 dds 
 - 
 datasets 
 - 
 polygon 
 
  
  npm 
  
 i 
 
  
  npm 
  
 start